Method of making glass letters



y E. c. GMI-:LIN

METHOD o? MAKING @Lass LETTERS Fileduarch 30.19211 5 sheets-sheet 2 Www-mmv Teh, 5, m4. Y 1,482,789

5 acpcsmeLm METHOD oF MAKING GLASS LETTERS Filed Maken so. 19:214 3 sheets-sheet s.

@etentedeho Si, i924,

' tisana EUGENE C. Ol? GHICAGO, KLLINM maroon or. names enses narrare.

application nee noch se, rear. seran n. essere.

'To all whom t may concern."

Be itknown that l, EUGENE C. GMELIN,

. a citizen oi the United States, residing at as indicated hy line 6 ol Fi 5, li.

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407 North. Wells Street, Chicago, in the county 4of lCook and State of Illinois, have invented a new fand useful improvement in Methods of Making Glass Letters, of which the following is a specification.

`'.lhis invention relates to improvements in the method of forming raised glass lett-ersl or other characters in' sheets of glass. AFor convenience of description l have shown the method of forming the letter E; although it is obviousthat, without detracting from the spirit of this invention, any other letter, or any numeral, or character, or gure of any kind could he formed hy use of my invention,l A

@ne method, embodying the features or my invention, of forming aletter, `is disclosed `in the accompanying drawings in whichldnigure'l is a view in elevation of a blow-torch used in the practice ci my invention, Fig. 2 is a vertical sectional view of the atomizing-nozzle forming' a part oi the hlow-torch,Fig. 3 is a vertical sectional View or a Tourner-tip oi the `blow-torch, Fig. l is' a View tahen'as indicated hy line t oil Fi f, 3, Fig. ois a pers ective view showing a gie in place on a tab e, to he used in connection with the form of a letter, Fig; o

is a vertical sectional view or the die talreili is a view in perspective of a eet of ass rom'which a letter is to loe formed, F10 8 1s a view in perspective 'of a sheet of glass on the die alter the letter has been formed, Fig, 9 is a view in perspective of the sheet of glass removedfrom the die and turned over showin the completed letter raised from the sur ace, Fig. l is a view in perspective of a step in the method et iiorming a letter, showing a letter parti formed,A

de shown in the' drawings 'indicates in general a blow-torch adapted to he operated 1n the usual manner with gas and air. The

torch includes a T connectionl havi' a gas inlet pipe 1l entering at the top an an airA inlet pipe 12 entering1 at one and.' The gas pipe, l1L is connectedhyi. suitable piping to the Horrible hose 13 which-.,inturn is con.-

v nected .tol a suitahleiigas snpply.

l'lhe air ipe l2 is'lihewise connected to a derihle ose it which isconnected to any suitable supply oil air under pressure. Pipe 12 ter inmates inside or the T in the towed lthe tip is as iol owe.

yielding so that atomizing-noaslel. To the other end el the l 10 is connected an enlarged mining.

tube lo having attached to its end' at a slight angle the hurnertip l?. This burn er-tip is shown in section in Fig. 3. llt will be seen that within this tip is mounted ya cylindrical casting of correct size as insmaller than the inside diameter of the tip, i

leavin a circular space or craclr 2l between such ange and the linner wall of the tip.

Four holes are drilled through the casting,

These holes are indicated hy 26., The cast A ingis held in place hy a set screw 29, The torch is operated hy gas andair or proper proportions to form an indammahle minture which will burn at the end or the burner-tip. ,The parese ot the casting inside As the torch is in use the space Q10-will he lled with indennmahle mixture enteriny through 'thev holes 26., ll the gas is ina vertently turned ed causing the torch to go out, or il the torch hlowe ont, or goes out from any other cause, the mixture in the space will burn 'very slowly at the oracle 2d until it is entirel used up, Since this craclr4 is very sine this learning will continue for some time alter the torch has gone out. Such burning serves therefore in the nature or a. pilot-= light by which the-torch may again he' res lighted ley merely turning on vthe proper supply of gas and air.

lathe practice ot m invention l' rovide a plate or die ormed of cast iron or any other suitable material o appropriate dimensions, having formed in its u per surface ooves or sunken rtions de ineating the letter or gure which it 1s desired to term in the glass.l As here shown, the die sheet el glass 32 of a to cover the-die. l t en place the sheet of glass on th die so that the sunken portions are covere l then` light the torch A and naakte@ .as me eimer indicata ey a5' downwardly onto .the sheet t glass., The heat softens the glass until it is suiciently the pressure caused by the blast will for tcompletely down into the depressions in the dies causin it to conorin to the surface of such epressions. Gravity assists the process. As shown in Fig. l() the portion of the glass sheet directly under the flame 35 has already been softened and forced down into the depression in the die. The flame is moved over the die until the sheet of glass has been softened and pressed down into the mold at all points. When this process has been completed the glass will appear as shown in Fig. 8. The glass is then allowed to cool until it is hard, whereupon the plate may be removed and turned over as shown in Fig. 9, so that the letter that Was formed will appear in relier` as indicated by 50. Y ln carrying out in improved process, the blow-torch flame s ould not be applied directly to a cold sheet of' glass since this might cause such a sudden change of temperature as to crack the glass. lt will be found desirable to preheat the glass gradually to a certain extent first before placing it on the die and before applying the blow-torch Haine thereto. It will also be found desirable to heat the die to a certain extent separately before layin the sheet of glas upon it, so that there Wil be no chilling effect upon the lass which might crack it. ln other wor s, proper precaution should be taken, as suggested above, or in any other manner to prevent any damage to the glass. Like- Wise, after the completion ofA the process the glass should he properly annealed.

Although the present invention hasgbeen described by describing in detail one par. ticular method of carrying it out, it is notv intended that these details shall be regarded as limitations'upon the scope ot' the invention except in so far as included in the accompanying claims.

l claim: l. The method of roducing a raised character in a sheet of g ass, Which includes the providing of a die having on its surface a pasarse depression corresponding to they character to be formed, the placing ot' a sheet of glass on the die to cover such depression, and the applying of a flame from a blow-torch downwardly und directly on to the portion of said glass over such depression and with such pressure as to heat, soften, and force said glass mainly thereby into such'depression.

l2.'The method oit producing a raised character ina sheet of glass, which includes the applying ot' a flame t'roin a blow-torch down\\'ardly and directly on to said sheet of glass to heat, soften and force said glass mainly thereby into an intaglio die placed beneath said sheet of glass, said die having onits surface a depression corresponding to the character to be formed.

3: The method ot' producing a raised character in a sheet ot' glass, which includes the supporting of the' sheet in such a manner as to leave unsupported portions thereof corresponding to the character to be formed, and the applying ot' a Haine from a blowtorch downwardly and directly on to the unsupported portions of said glass to heat, soften and depress said portions mainly thereby. v

4. -Thc method of reducing a raised character in a sheet of g ass, which includes the providing oi a die having on its surface a epression corresponding to the character to be formed, the placinr ot a sheet of glass on the die tol cover suci depression, and the applying of a flame from an adjustable blow-torch downwardly and directly on to the portion of said glass over suoli depression and rWith such pressure as to heat, soften, and'force said glassmainly thereby into such depression.

In Witness whereof l have hereunto set my hand and seal this 28th day of March, 1921.

EUGENE c. GMELIN. [ne] 

